periodic table

periodic table   Dan periodic table

Mendeleev discovered the periodic table while attempting to organise the elements in February of 1869 He did so by

Its Story and Its Significance Eric R Scerri Table Fragment of Mendeleev's Periodic Table of 1904 Showing the Positions of Predicted Elements x and Elements in the same group share similar characteristics, like reactivity The table is divided into

ยูฟ่าเบท007 The periodic table contains seven periods 5 In each period, the elements' atomic numbers increase from  The Periodic Table The periodic table is an organisation of elements arranged in increasing atomic number into a series of columns and rows (